Pyrethroid mechanism of action diagram

How pyrethroid works β€” illustrated mechanism of action Β· PestControlBasics.com

πŸ§ͺ ACTIVE INGREDIENT Pyrethroid β€” IRAC 3A ⚠️ CAUTION

Lambda-Cyhalothrin

One of the most widely used professional pyrethroids β€” sold under four major brand names including Demand CS and Cyzmic. Understanding that these are identical in chemistry prevents costly duplicate purchases.

4+
Brand Names
30+
Target Pests
60–90 days
Residual Life
No
OMRI Organic
βš–οΈ Educational use only. Always read and follow the full product label β€” the label is the law under FIFRA. Full disclaimer β†’ | βš—οΈ Mixing Calculator β†’
βš–οΈ
For informational and educational purposes only. PestControlBasics.com is not a licensed pest control operator and does not provide pest control advice, recommendations, or professional services. All pesticide applications must comply with the product label β€” the label is the law under FIFRA (7 U.S.C. Β§ 136). Always read the full label before use. Consult a licensed pest management professional for infestations involving structural damage, public health pests, or any situation where safety is a concern. SDS/MSDS links open third-party sources; PestControlBasics.com is not responsible for their content.

🏷️ Brand Names β€” Same Active Ingredient

⚠️ Don't buy duplicates. All products below contain lambda-cyhalothrin as the active ingredient. They differ only in concentration, formulation type, and price β€” not in how they work or what they kill. Buying two different brands is buying the same pesticide twice.
Demand CS
Syngenta Β· Microencapsulated suspension
9.7% lambda-cyhalothrin
Professional
Cyzmic CS
Control Solutions Β· Microencapsulated suspension
9.7% lambda-cyhalothrin
Professional (generic)
Scimitar GC
Syngenta Β· Capsule suspension
11.8% lambda-cyhalothrin
Golf course/turf
Karate Z
Syngenta Β· Liquid
2.08% lambda-cyhalothrin
Agricultural
Martin's Cyonara
Control Solutions Β· RTU spray
0.5% lambda-cyhalothrin
Consumer

🎯 Target Pests

βœ“Ants
βœ“Cockroaches
βœ“Fleas
βœ“Ticks
βœ“Mosquitoes
βœ“Spiders
βœ“Scorpions
βœ“Bed Bugs (contact)
βœ“Wasps
βœ“Earwigs
βœ“Silverfish
βœ“Centipedes
βœ“Millipedes
βœ“Crickets
βœ“Stink Bugs
βœ“Asian Lady Beetles
βœ“Boxelder Bugs
βœ“Stored Product Pests

βš—οΈ Mixing & Dilution Guide

Rates below are general guidelines. Always follow your specific product label β€” rates vary by brand and application site.

General perimeter spray (concrete/soil)
0.2–0.4 fl oz / gal
Apply along foundation, under eaves, entry points. Repeat every 60–90 days. Demand CS and Cyzmic CS are interchangeable at this rate.
Spot treatment indoors
0.1–0.2 fl oz / gal
Apply to cracks, crevices, baseboards only. Lower rate for indoor use. Keep people and pets out until dry (β‰ˆ30 min).
Mosquito barrier spray (foliage)
0.4 fl oz / gal
Apply to shrubs, grass, and ornamental foliage. Do not apply to blooming plants. Highly toxic to bees β€” apply evening only.

⚠️ Safety & Precautions

  • Extremely toxic to fish and aquatic invertebrates β€” do not apply near water or storm drains
  • Highly toxic to bees β€” apply only in evening when foraging is minimal
  • Cats are sensitive to pyrethroids β€” keep off treated surfaces until fully dry
  • PPE required: gloves, long sleeves, eye protection during mixing
  • REI (Re-Entry Interval): 12 hours for agricultural, 30 minutes (dry) for residential
Example
0.5 oz
per gallon
βš—οΈ Mixing Calculator
Enter your sprayer size and target rate β€” get the exact amount to pour. Backpack, hand sprayer, hose-end, or skid unit.
Open Calculator β†’

🌿 Environmental & Ecological Impact

🐝 Bees / PollinatorsHIGH
🐟 Fish / Aquatic LifeVERY HIGH
🐦 BirdsLOW
πŸ• Mammals / PetsLOW
🦐 Aquatic InvertebratesVERY HIGH
πŸ’‘ Broad-spectrum pyrethroid. Highly toxic to bees and aquatic organisms.

⏱️ Residual & Re-entry Timeline

πŸ”Ή
Apply
Follow label mixing and application rates
πŸ”Έ
Re-entry: 2–4 hours (until dry)
Keep people and pets out of treated area
🟒
Effective period: 60–90 days
Active residual β€” killing or repelling target pests
πŸ”„
Reapply
Re-treat when pest activity returns or residual expires

❓ Frequently Asked Questions

Q: Is lambda cyhalothrin safe for pets?
Follow the product label. Keep pets out of treated areas until completely dried (2–4 hours for sprays). Once dry, treated surfaces pose minimal risk to dogs and cats.
Q: Can I use lambda cyhalothrin indoors?
Check the specific product label β€” formulations vary. Baits and dusts often have indoor labeling; concentrates and granulars are typically outdoor.
Q: How long does lambda cyhalothrin last after application?
Residual varies by formulation, surface type, weather, and UV exposure. Indoor applications last longer than outdoor. Check the product label for re-application intervals.
Q: What should I do if exposed?
Remove contaminated clothing, wash skin with soap and water. For eye contact, rinse 15–20 minutes. For ingestion or severe symptoms, call Poison Control (1-800-222-1222). Have the product label available.

πŸ“‹ Safety Data Sheet (SDS)

πŸ“‹

Demand CS β€” Safety Data Sheet

View the official SDS document for this product directly on the CDMS label database.

Demand CS Safety Data Sheet page 1
πŸ“„ Demand CS β€” Safety Data Sheet Β· View the complete SDS document above or download below
βš–οΈ
For informational and educational purposes only. PestControlBasics.com is not a licensed pest control operator and does not provide pest control advice, recommendations, or professional services. All pesticide applications must comply with the product label β€” the label is the law under FIFRA (7 U.S.C. Β§ 136). Always read the full label before use. Consult a licensed pest management professional for infestations involving structural damage, public health pests, or any situation where safety is a concern. SDS/MSDS links open third-party sources; PestControlBasics.com is not responsible for their content.
πŸ“š Sources: EPA Pesticide Labels Β· NPIC Pesticide Info
Published: Jan 1, 2025 Β· Updated: Apr 7, 2026
🔮
Reviewed by Derek GiordanoContent reviewed by a licensed pest management professional and cross-referenced against EPA, university extension, and manufacturer technical data. Last reviewed: April 2026.